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Mason jar Line breaks: Mason jar
Pronunciation: /ˈmeɪsn dʒɑː/

Definition of Mason jar in English:


North American
A wide-mouthed glass jar with an airtight screw top, used for preserving fruit and vegetables.
Example sentences
  • Orson Welles stuck a Mason jar inside a toilet bowl and made all of America believe the sound was an alien spacecraft opening during his terrifying ‘War of the Worlds’ broadcast.
  • Take along your favorite flea-market finds too: an old chair or two, chunky go-anywhere dishes, and reliable Mason jars.
  • We caught butterflies in the patches of wildflowers, encased fireflies in Mason jars, and ran down horned frogs which we'd keep all summer and release before school started.


Late 19th century: named after John L. Mason (died 1902), American inventor.

Definition of Mason jar in:
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